Construction Techniques for Erection of Steel Truss Girder of Main Bridge of Fenfangwan Changjiang River Bridge

The main bridge of Fenfangwan Changjiang River Bridge in Chongqing City is a semi-floating system steel truss girder cable-stayed bridge with double pylons,double cable planes and with span arrangement(216.5+464+216.5) m.The main girder of the bridge is designed as the steel truss girder structure erected by the piece-by-piece assembling.In the light of the topographic conditions of the south and north banks,the asymmetric way of erection was chosen for the girder.The steel truss girder on the south bank side was erected from the side span towards the central span.The girder of the side span was assembled on the scaffolding,the girder in the middle was erected first and then the components like the edge stringers and edge deck plates were erected,using the deck truck cranes.The girder for the main span was erected by the cantilever assembling method.The girder of the north bank was erected by the balanced two-cantilever assembling method and the 5 blocks of the girder atop and on both sides of a main pier were assembled on the pier-side brackets.